Music-leaf turner



Oct. 31, 1950 H. A. sJoBLoM 2,528,289

MUSIC LEAF TURNER Filed Feb. 7, 1947 2 3 1 965 t i a a i 2 2? 4 /4 Z/S 5l9 INVENTOR ATTORNEYS Patented Oct. 31, 1950 MUSIC-LEAF TURNER HermanAlexander Sjiiblom, Hclsingfors, Finland Application February 7, 1947,Serial No. 727,235 In Finland February 28, 1946 3 Claims. (Cl. 84-490)The present invention refers to a music-leaf turner consisting of anumber of turning levers operated by springs and pivoted on a verticalpin, an element by which these levers are locked in a cocked positionand a releasing appliance acting on this element, by the aid of whichappliance one lever at a time is released from its cocked position sothat the lever, while turning by the action of its spring, turns a leafof music.

Typical for this invention is that the element locking the turninglevers in a cocked position consists of a forked lever operated by aspring and pivoted on a pin the branches of the fork of which lever arefurnished with stops of which one locks the lever to be turned next andthe other retains the other levers in a cocked position while allowingthe lever next the one to be turned to move into the place of the turnedlever after it has been released by pressure on the releasing appliance.

This invention is particularly described in and by the followingstatement and the accompanying drawing, showing by way of example oneconstruction of it, in which drawing- Figure l is a front view of themusic-leaf turner fixed on to a music-stand;

Figure 2 shows the appliance seen from above and for the sake ofdistinctness drawn to a larger scale than the previous figure;

Figure 3 shows a section along the line 3-3 in Figure 2;

- Figure 4 shows a section along the line 4-4 in Figure 2;

Figure 5 shows the same as Figure 4 but in another position;

Figure 6 shows a turning lever fitted on to the vertical pin andoperated by a spring, for the sake of distinctness drawn toa largerscale than in Figure 3;

Figure 7 shows a section along the line 1 in Figure 6;

Figure 8 shows another part drawn to a larger scale than in Figures viand 5 and seen from the opposite side.

In the drawing, l is a support against which the music-book 2 rests, 3is a rail supporting the music-book from below, which rail is furnishedwith an opening 4, Figure 2, for the appliance according to theinvention. The appliance is fitted into the opening 4 in such a way thatthe side edges of the opening enter into slits 6 in the arched part 5 ofthe appliance. One part of the rear wall I of the appliance is bentforwards to form a bracket 8 to which a pin 9 is fixed. on this pin someturning levers 10-43 are pivoted. Each of these levers is operated by aspring [4 turned round pin 9, the one end of which spring is insertedinto a hole [5 in the turning lever and the other in a hole l6 made foreach spring in the rear wall I of the frame.

To lock the turning levers Ill-l3 in a cocked position there is a forkedlever [1-48, which by the aid of screws, pins or such like I9 is pivotedon to a bracket 20 at the back of the rear wall 1 so as to revolve inthe vertical plane. The forked lever l'|l8 is operated by a spring 2|,which tends to keep the forked lever in a horizontal position. For thispurpose the one end of the spring is attached to the forked lever andthe other to bracket 20. The upper branch ll of the forked lever has anextension 22, bent downwards as an arch, to the lower end of which isfixed a contact disc 23 in such a way that a light pressure downwardssets the appliance working.

The upper branch I! of the forkedlever ll|8 is furnished with a stop 24directed towards branch 18. At a point 25 of the lower branch a plate 26is pivoted, the upper and lower edges of which are bent towards branch[8 and thus form stops preventing the plate from turning round point 25.The plate 26 is operated by a spring 21, the one end of which isinserted into a hole 28, Figure 8, in branch I8, while the other endrests from below against the upper edge 29 of plate 26, which edge isturned towards branch It. The point of this upper edge is marked 30.

The centre 3| of the outer part of the turning levers ill, I I, I2 andI3 is split at the top and bottom edges and pressed to the side in sucha way that, seen from above, there are formed slits into which L-shapedturning arms 33, Figure 1, made of celluloid or some other transparentmaterial, can be inserted.

When the appliance is being used the levers Ill-l3 are cocked, in thecase illustrated in Figure 2, by being turned from left to right, i. e.in a direction opposite to that shown in the figure by drawn arrows. Inthis way the point of the first lever l0 comes behind the upper edge 30of part 26 and keeps the other levers in a cocked position. When theleaves of the music-book are turned in such a way that the leaf to beturned first is on the left side of the opening, the contact disc 23 ispressed, at which the forked lever I1-l8 turns round pin H) from theposition shown in Figure 4 to that shown in Figure 5. When the obstaclerepresented by edge 30 of part 26 is removed out of the way of turninglever 10, being the first to be turned, it turns by the action of itsspring l4 from right to left, i. e

into the position shown in Figure 2. In this position a turning arm 33,Figure 1, made of celluloid or another transparent material is inserted.When, after this, all the other three turning arms are inserted in thesame way in their places, all the levers lEll l and turning armstogether with the music-leaves are returned into a cocked position.

When the contact disc 23 is pressed the first time after this, turninglever turns and with it arm 33 carrying with it the first music leaf tobe turned. In exactly the same manner the other music leaves are turnedin due order.

When studying Figures 4 and 5 it will be noticed that when the forkedlever is pressed downwards, stop 24 keeps the other levers in position,except the one to be turned next, which is released from its cockedposition as soon as point 30 of the upper edge of part 26 has moved outof its way.

Spring 21 is to be made soft enough not to prevent part 26 from turningwhen the turning arms are turned into cocked position.

The construction shown in the drawing as an example shows only threeturning levers. It is, however, evident that the number of levers can beconsiderably increased. Also in other respects the actual practicalconstruction of the appliance can vary considerably within the limits ofthe invention. Thus the attachment of the appliance can be executed indifferent ways from that which the example of the drawing shows. Theappliance can easily be fixed on to the music-stand of a piano,grand-piano or otherimusical instrument.

I claim:

1. A music leaf turner, comprising the combination of a base adapted forattachment to a music support and having a pivot pin thereon arranged toextend vertically when the base is attached to said music support, aplurality of turning levers mounted for rotation on said pivot pin fromone side of the music support to the other, biasing springs interposedbetween said base and the respective turning levers so as to urge saidlevers towards one side of the music support, and latching means on saidbase for retaining the turning levers on the opposite side of the musicsupport and arranged to engage the foremost turning lever, said latchingmeans having a retaining member arranged. toengage the i turning leverimmediately behind the foremost turning lever when actuated toreleasesaid foremost lever, with upright leaf turning arms having horizontaloffset portions mounted on said turning levers so as to bear against theleaves of music placed upon the music support and sweep the respectiveleaves over to the first mentioned side of the music support when theindividual turning levers are actuated by said biasing springs.

2. A music leaf turner, comprising the combination of a base adapted forattachment to a music support and having a pivot pin thereon arranged toextend vertically when the base is attached to said music support, aplurality of turning levers mounted for rotation on said pivot pin fromone side of the music support to the other, biasing springs interposedbetween said base and the respective turning levers so as to urge saidlevers towards one side of the music support, and latching means on saidbase for retaining the'turning levers on the opposite side of the musicsupport and arranged to engage the foremost turning lever, said latchingmeans having a retaining member arranged to engage the turning leverimmediately behind the foremost turning lever when actuated to releasesaid foremost lever, with transparent upright leaf turning arms havinghorizontal offset portions mounted on said turning levers so as to bearagainst the leaves of music placed upon the music support and sweep therespective leaves over to the first mentioned side of the music supportwhen the individual turning levers are actuated by said biasing springs.

3. A music leaf turner, comprising in combination, a base adapted forattachment to a music support and having a pivot pin thereon arranged toextend vertically when the base is attached to said music support, aplurality of turning levers mounted for rotation on said pivot pin fromone sideof the music support to the other, each of said levers having aportion intermediate of its top and bottom edges offset to form, withthe main body of the lever, a split opening, biasing springs interposedbetween said base and the respective turning levers so as to urge saidlevers towards one side of the music support, latching means on saidbase for retaining the turning levers on the opposite side of the musicsupport and arranged to engage the foremost turning lever, said latchingmeans having a retaining member arranged to engage the turning leverimmediately behind the foremost turning lever when actuated to releasesaid foremost lever, and L-shaped leaf turning. arms having one limbthereof adapted for insertion into each of said split openings and, whenso inserted,

REFERENCES CITED The following references are ofrecord in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 552,228 Barrows Dec. 31, 1895569,726 Stacy Oct. 20, 1896 1,196,987 Rowe Sept. 5, 1916 2,012,992 Franz-l Sept.3, 1935

